Quick-break switch



Aux. SUTHTERLAND.

QUICK BREAK SWITCH.

APPLlCATlON FILED NOV. Il. i918.

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fammes/s felilbl' TBUMEULL ELECTEC Application iiled Novembei il, 1913. Serial No. 262,062.

the moment of interrupting Elie circuit.,

iieiiy eiaced the invention iesides in the combination 'with the movable switch elemem .and the operaiieg mein'oci' tliei'e'for, olf e, positive loot motion connection between llie operating member and Switch member including -pivoied links having losll motion engegeinent with one of seid poets and e Spiilifg connection foi 'normallyialiing op suoli loot emision.

A special eeture of che invention ie 'che connection the losl; motion links directly Willi elle switch bledee eo es io. gel, e direct eifaiglil: pull on tile swiicli blades and e uiiiiei' feature of invention is che making of these connecting linie?, ci' insulating meieiial lo prevent conduction of cum'enl; fiom che switch blades to ille svvilcn opei'aiing;

member.

@licei- :eaiures ci elle invention Will uppeai es elle specificeiioii pro'ceee ln the accompanying drei illusli'ated elle invention embodied iii e picoctical commciciel fone. but ic will lie undeceood che@ elieiiges eed modi" es come 'Within the scope of elle :appeeded claims may loe made without depeitnre 'ii-om the true spire, of che iii-vencion, ln said d'fewingl lligufel, is :i top plain viev." or from; view of a switch having liblie lie/allures of elle im vencion incorporeced eliereiio.

Fig. 2, is o. cross sectional seine` taken s'olisilancielly on lee pleno of elio line of' Fig. l.

lo the conszrnction illustrated, alle moveble element of che swiicli ie mede up of a pluzelley ci swieli blades 5 pivoied et 6 end arranged to engage the conteccs ci* clips 7. The ieee ends of said svviicli blades ere Vconnected in substancial parallelism by a Speeieaion of Leiters Patent.

cations suoli view of alle cross bar 8 usually made of insulating mate rial, es shown.

The operating member slots in the disclosure of a handle 9 at, l in substantial alinenien; iv s wtcli pivotv and having an oscillemog op cretino arm 11.

The lost motion connections between ilo-e operating arm and the switch blades ,consist of the links. l2, having iii the illustration, pivotal connection with both the switch blades and the operating afin. As shown, the connection with the evvitcli blades et one end is e plein pivotal connection. l and at che opposite end the links aire slotted es indicated at 14- to receive Ene operating acm ll and provide botli o pivotal connection und a lost motion engagement between clic links and the operating acm.

In the construction illustrated, the linke are eirenged 'in pei-rs, one at eecli side oi each switch `clade. This eqoelizee che pull.-

on each switch blade, the force being *eliciteby applied directly in line with the Swiclo. pivots' and contact clips. This makes e smooth, easy action and avoids any binding of the parts. Y

ln View of elle fact that the operating links are directly connected with the switch blades, l piefei' to construct seid links of insulating material so as to prei/eci'concluen tion of convent cono the switch loledee'io 'lie operating niembezj. These .links may be cut i-oin let sheetsy of insulating material, being' punched toehape with the pivot hole in one end and the longitudimil slot in the opposite end. Single, 'i'iveiz-el; tile-pivot point 13, suffices lo liold each pair oi" links together et elle opposite :sides of o eivi'tcli blade:

A, yielding connection' isI piovicled loe ivveen the operating member and movable lswilicli elemeni, the same consisting in `ilie disclosure of a plumlity ci coiled spiings l connected between the c'ioss bai 8 and the operating erm From tile 'foregoing description il; will be seenltliet upon rocking che handle in a switch opening direccion the operating erm will loe carried to the farthest or outer end of the slots in the links, `grovidiniog o posi tive connection between elle operating arm 'and sivitcli blades, iilcideclsally'` placing the springs under tension. s 4the switch for the swicli coin-A [Il ig. 2) the's ring connections will react and snap the bades quickly out of engageinent with the stationary contacts, the lost motion'referred to allowing for this snapping movement of the blades independently of the movement of the operating member l1. I

The quick break movement is further asi I sisted in the present' disclosure by the switch yao' opening spring 16 which is shown anchored at one end at 17 to a relatively stationary blades pivoted to said posts land adapted to' engage said contacts, an insulating vcross bar connecting said blades, a swinglng operatipg arm, an insulating link connecting each blade with said arm, and a spring connecting said insulating cross ,bar with said arm. f

' 4. In an electric switch,.af stationary contact, a post a .blade hinged to said post and adapted to ,engage said contact,.a swinging operating arm and a slotted link connecting said blade and said arm formed of two pieces o/finsulating fiber with the blade secured between the same, and a spring for support and connected at its opposite end/mbving saidblade in one direction with. a

with the operating arm 11.` The tenderzy of this spring'is to throw the switchas soon as the movement of the handle islstarted, to the full open position.

I claiii l. In a switch of the characterv described,

,a plurality ofstationary posts, switch blades pivoted thereto, a pluralityfof contacts, a cross bar connecting said blades, a rocking switch 'operating arm, insulating links pivotedat one end to the switch blades and having an elongated slot at the other end for engagement withl the operating arm and a spring connected at opposite ends with the operating arm and the cross-bar.

2. In an electric switch, a series .of stationary contacts, a series of posts, switch blades rpivoted to said posts and adapted to engage said contacts, an insulating cross bar connecting 'said blades, a swinging operating arm, and an insulating link pivotally connecting each blade with said arm.

`Q3. In an electric switch, a series of stasnap action. v 5. In an electric switch, a stationary contact, a post, ablade hinged to said post adapted to engage said contact, a swinging operating arm and a link connecting said vblade and said arm formed 'of two pieces of insulating'iiber with the. blade secured between the same, vsaid pieces of fiber having elongated slots to allow the operating arm and blade to have relative independence of motion. 'l

6. In a switch of the character described, a plurality of posts, a plurality of contacts, a movable switch member including switch blades pivoted to said posts and a -bar conriecting said blades, a swinging operating arm, a lost motion connection between said arm and each of said blades, and a spring connecting said ai'm'and switch member for` .throwing the switch member to open circuit position with asnap action.

ALEXANDER K. SUTHERLAND; 

